Joe Clarke makes his intentions clear. He steps down the pitch and whips Simon Harmer past mid-on for his second boundary.

The right-hander repeats the stroke two balls later, but this time directs it to the off-side of the wicket.

Hesitation by the two Notts batters, but Matthew Montgomery is safely through for a single.

Joe Clarke is off the mark with a cover drive for four. Six overs completed now by Sam Cook. How many more will Tom Westley give him in this spell?

Essex call up Simon Harmer. He'll enjoy this, with the two Notts batters under a bit of pressure to get the scoreboard moving.

Three runs from it. Notts need 214 from 29 overs.

Joe Clarke safely negotiates the final two balls of Sam Cook's over.

He isn't a player that likes to be tied down, can he supply a few extra revs for the Notts engine?

Michael Neser might still have designs on overtaking his personal first-class best of 136 - he needs 17 more but he isn't likely to get more than a handful of overs to do it.

As it happens, Jamie McIlroy is already on his first-class career best - he's made 11 not out in their unbroken partnership of 66.

Looks like we're in for an interesting final session at Trent Bridge. How do you see this one going, Notts and Essex followers?

A couple of nice drives from Matthew Montgomery off Jamie Porter, but he can't pierce the Essex field. Back to back maidens.

Another over ticks by. It's a maiden by Sam Cook.

Notts still have 32 to reach this target but someone is going to have to look to assert himself fairly soon.

Jamie Porter is offering Notts absolutely nothing to hit - Ben Slater takes a single to deny him a second maiden, but that's 0-2 from three for the Essex paceman.

Grace Ballinger
The Blaze bowler on BBC Radio Nottingham

"It's a pretty gutsy call by Essex. It [the pitch] is a road and Notts bat pretty deep, so you'd back them to win from here."

Testing over from Jamie Porter to Ben Slater. It's a maiden.

Notts can afford to take a look for a few overs - but not too many.

Yes, Glamorgan are still batting. As they have been for two full days!

Ali Orr has just sent down an over that included some gentle medium pace lob-ups and the players go off for a cuppa.

Michael Neser is 116 not out, Jamie McIlroy is 11 and the visitors lead by 362 - for what it's worth. Expect handshakes around 5pm.

Given that they declared at tea, you wonder who Essex see as the bowlers most likely to take wickets for them.

On a worn fourth-day pitch, you'd say that Simon Harmer would be a major threat, but this one is pretty flat.

A couple of singles for Notts from Sam Cook's second over.

Tidy over from Jamie Porter. Just a leg bye and a single added to the Notts total. Remember, they needed a rate of 5.61 at the start of this chase.

Ben Slater is off the mark with a single and Haseeb Hameed whips Sam Cook's final ball to mid-wicket for four. Another 214 needed by Notts.

Ali Orr joins Tom Alsop to have a bowl - there's a sentence you wouldn't often read - and concedes six from his first over.

Michael Neser then takes a single off Alsop to propel Glamorgan to the second highest first-class total in their history - exceeding their 718-3 against Sussex 23 years ago.

The only total that still surmounts this one is their 795-5 declared at Leicester last year, but surely handshakes will have taken place before we get near that kind of territory.

Ben Slater and Haseeb Hameed are out in the middle.

Sam Cook will bowl the opening over.

Which way is this going to go?